WordPress up to 4.9.1 Flash Fallback File mediaelement cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in WordPress up to 4.9.1 and classified as problematic. Impacted is an unknown function of the file wp-includes/js/mediaelement of the component Flash Fallback File. Performing a manipulation results in cross site scripting. This vulnerability is reported as CVE-2018-5776. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in WordPress up to 4.9.1 (Content Management System). It has been classified as problematic. This affects an unknown part of the file wp-includes/js/mediaelement of the component Flash Fallback File. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

The bug was discovered 01/16/2018. The weakness was disclosed 01/18/2018 (Website). It is possible to read the advisory at codex.wordpress.org. This vulnerability is uniquely identified as CVE-2018-5776 since 01/18/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 106304 (WordPress < 4.9.2 MediaElement.js Flash Fallback XSS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 11914 (WordPress Prior to 4.9.2 Cross-Site Scripting Vulnerability).

Upgrading to version 3.7.25, 3.8.25, 3.9.23, 4.0.22, 4.1.22, 4.2.19, 4.3.15, 4.4.12, 4.5.13, 4.6.10, 4.7.9, 4.8.5 or 4.9.2 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106304). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 106304
Nessus Name: WordPress < 4.9.2 MediaElement.js Flash Fallback XSS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 871021
OpenVAS Name: WordPress Multiple Vulnerabilities-Jan 2018 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: WordPress 3.7.25/3.8.25/3.9.23/4.0.22/4.1.22/4.2.19/4.3.15/4.4.12/4.5.13/4.6.10/4.7.9/4.8.5/4.9.2
Patch: github.com

Timelineinfo

01/16/2018 🔍
01/16/2018 +0 days 🔍
01/18/2018 +2 days 🔍
01/18/2018 +0 days 🔍
01/18/2018 +0 days 🔍
01/19/2018 +1 days 🔍
01/24/2018 +5 days 🔍
02/02/2023 +1835 days 🔍

Sourcesinfo

Product: wordpress.com

Advisory: 3fe9cb61ee71fcfadb5e002399296fcc1198d850
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-5776 (🔍)
GCVE (CVE): GCVE-0-2018-5776
GCVE (VulDB): GCVE-100-112227
SecurityFocus: 102730

Entryinfo

Created: 01/19/2018 08:00
Updated: 02/02/2023 09:04
Changes: 01/19/2018 08:00 (71), 06/07/2020 16:08 (3), 02/02/2023 09:00 (5), 02/02/2023 09:04 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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